Deirdre Gallagher (born July 13, 1974 in Ballina, County Mayo) is a retired female race walker from Ireland. She represented Ireland in the 1996 Olympic Games held in Atlanta.
| Year | Competition | Venue | Position | Notes |
|---|---|---|---|---|
| Representing Ireland | ||||
| 1994 | European Championships | Helsinki, Finland | 25th | 10 km |
| 1995 | World Championships | Gothenburg, Sweden | 33rd | 10 km |
| 1996 | Olympic Games | Atlanta, United States | 23rd | 10 km |